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9ee6f10407
previously, global dtors, which are executed after all atexit handlers have been called rather than being implemented as an atexit handler themselves, would deadlock if they called atexit. it was intentional to disallow adding more atexit handlers past the last point where they would be executed, since a successful return from atexit imposes a contract that the handler will be executed, but this was only considered in the context of calls to atexit from other threads, not calls from the dtors. to fix this, release the lock after the exit handlers loop completes, but but set a flag first so that we can make all future calls to atexit return a failure code.
musl libc
musl, pronounced like the word "mussel", is an MIT-licensed
implementation of the standard C library targetting the Linux syscall
API, suitable for use in a wide range of deployment environments. musl
offers efficient static and dynamic linking support, lightweight code
and low runtime overhead, strong fail-safe guarantees under correct
usage, and correctness in the sense of standards conformance and
safety. musl is built on the principle that these goals are best
achieved through simple code that is easy to understand and maintain.
The 1.1 release series for musl features coverage for all interfaces
defined in ISO C99 and POSIX 2008 base, along with a number of
non-standardized interfaces for compatibility with Linux, BSD, and
glibc functionality.
For basic installation instructions, see the included INSTALL file.
Information on full musl-targeted compiler toolchains, system
bootstrapping, and Linux distributions built on musl can be found on
the project website:
http://www.musl-libc.org/